lay a foundation

/L EY1 AH0 F AW0 N D EY0 SH AH0 N/
verb
  1. 1

    (figurative) To make a start.

  2. 2

    Used other than figuratively or idiomatically: see lay, foundation.

  3. 3

    (law) To elicit information from a witness to show that the witness has knowledge of a matter before the witness testifies to the matter itself.